Added option in order to build nGraph core static library (#2989)

CMakeLists.txt

@@ -168,6 +168,7 @@ option(NGRAPH_PYTHON_BUILD_ENABLE "Enable build nGraph python package wheel" FAL
 option(NGRAPH_PLAIDML_ENABLE "Enable the PlaidML backend" ${PLAIDML_FOUND})
 option(NGRAPH_DISTRIBUTED_ENABLE "Enable distributed training using MLSL/OpenMPI" OFF)
 option(NGRAPH_JSON_ENABLE "Enable JSON based serialization and tracing features" TRUE)
+option(NGRAPH_STATIC_LIB_ENABLE "Enable build nGraph static library" FALSE)
 
 if (NGRAPH_CPU_ENABLE
         AND

src/ngraph/CMakeLists.txt

@@ -493,7 +493,11 @@ endif()
 
 configure_file(version.in.hpp version.hpp)
 
-add_library(ngraph SHARED ${SRC})
+if (NGRAPH_STATIC_LIB_ENABLE)
+    add_library(ngraph STATIC ${SRC})
+else()
+    add_library(ngraph SHARED ${SRC})
+endif()
 
 if(NGRAPH_DISTRIBUTED_ENABLE)
     if(NGRAPH_DISTRIBUTED_MLSL_ENABLE)